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          LV07-04-strace命令-移植
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    <div class="post-body" itemprop="articleBody"><p>本文主要是strace命令的移植相关笔记。若笔记中有错误或者不合适的地方，欢迎批评指正😃。</p>
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<!-- Photo: https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV07-%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%E7%A7%BB%E6%A4%8D/LV07-04-strace%E5%91%BD%E4%BB%A4-%E7%A7%BB%E6%A4%8D/img/ -->

<details class="folding-tag" blue><summary> 点击查看使用工具及版本 </summary>
              <div class='content'>
              <table>    <tr>        <td align="center" width=150px>Windows版本</td>        <td align="left">windows11</td>    </tr>    <tr>        <td align="center">Ubuntu版本</td>        <td align="left">Ubuntu16.04的64位版本</td>      </tr>    <tr>        <td align="center">VMware® Workstation 16 Pro</td>        <td align="left">16.2.3 build-19376536</td>      </tr>    <tr>        <td align="center">终端软件</td>        <td align="left">MobaXterm(Professional Edition v23.0 Build 5042 (license))</td>      </tr>    <tr>        <td align="center">Linux开发板</td>        <td align="left">正点原子 i.MX6ULL Linux 阿尔法开发板</td>      </tr>    <tr>        <td align="center">uboot</td>        <td align="left">NXP官方提供的uboot，NXP提供的版本为uboot-imx-rel_imx_4.1.15_2.1.0_ga(使用的uboot版本为U-Boot 2016.03)</td>      </tr>    <tr>        <td align="center">linux内核</td>        <td align="left">linux-4.15(NXP官方提供)</td>      </tr>    <tr>        <td align="center">Win32DiskImager</td>        <td align="left">Win32DiskImager v1.0</td>      </tr>    <tr>        <td align="center">buildroot</td>        <td align="left">2023.05.1版本</td>      </tr></table>
              </div>
            </details>

<details class="folding-tag" blue><summary> 点击查看本文参考资料 </summary>
              <div class='content'>
              <table>    <tr>        <td align="center">分类</td>        <td align="center">网址</td>        <td align="center">说明</td>    </tr>    <tr>        <td align="center" rowspan="5">官方网站</td>        <td align="left"><a href="https://www.arm.com/" target="_blank">https://www.arm.com/</a></td>        <td align="left">ARM官方网站，在这里我们可以找到Cotex-Mx以及ARMVx的一些文档</td>    </tr>    <tr>        <td align="left"><a href="https://www.nxp.com.cn/" target="_blank">https://www.nxp.com.cn/ </a></td>        <td align="left">NXP官方网站</td>    </tr>    <tr>        <td align="left"><a href="https://www.nxpic.org.cn/" target="_blank">https://www.nxpic.org.cn/</a></td><td align="left">NXP 官方社区</td>    </tr>    <tr>        <td align="left"><a href="https://u-boot.readthedocs.io/en/latest/" target="_blank">https://u-boot.readthedocs.io/en/latest/</a></td><td align="left">u-boot官网</td>    </tr>    <tr>        <td align="left"><a href="https://www.kernel.org/" target="_blank">https://www.kernel.org/</a></td><td align="left">linux内核官网</td>    </tr></table>
              </div>
            </details>

<details class="folding-tag" blue><summary> 点击查看相关文件下载 </summary>
              <div class='content'>
              <table>    <tr>        <td align="center">分类</td>        <td align="center">网址</td>        <td align="center">说明</td>    </tr>    <tr>        <td align="center" rowspan="4">NXP</td>        <td align="left"><a href="https://github.com/nxp-imx" target="_blank">https://github.com/nxp-imx</a></td>        <td align="left">NXP imx开发资源GitHub组织，里边会有u-boot和linux内核的仓库</td>    </tr>    <tr>        <td align="left"><a href="https://elixir.bootlin.com/linux/latest/source" target="_blank">https://elixir.bootlin.com/linux/latest/source</a></td>        <td align="left">在线阅读linux kernel源码</td>    </tr>    <tr>        <td align="left"><a href="https://github.com/nxp-imx/linux-imx/releases/tag/rel_imx_4.1.15_2.1.0_ga" target="_blank">nxp-imx/linux-imx/releases/tag/rel_imx_4.1.15_2.1.0_ga</a></td>        <td align="left">NXP linux内核仓库tags中的rel_imx_4.1.15_2.1.0_ga</td>    </tr>    <tr>        <td align="left"><a href="https://github.com/nxp-imx/uboot-imx/releases/tag/rel_imx_4.1.15_2.1.0_ga" target="_blank">nxp-imx/uboot-imx/releases/tag/rel_imx_4.1.15_2.1.0_ga</a></td>        <td align="left">NXP u-boot仓库tags中的rel_imx_4.1.15_2.1.0_ga</td>    </tr>    <tr>        <td align="center" rowspan="2">I.MX6ULL</td>        <td align="left"><a href="https://www.nxp.com.cn/docs/en/data-sheet/IMX6ULLIEC.pdf" target="_blank">i.MX 6ULL Applications Processors for Industrial Products</a></td>        <td align="left">I.MX6ULL 芯片手册（datasheet，可以在线查看）</td>    </tr>    <tr>        <td align="left"><a href="https://www.nxp.com.cn/webapp/Download?colCode=IMX6ULLRM&lang_cd=zh" target="_blank">i.MX 6ULL Applications ProcessorReference Manual</a></td>        <td align="left">I.MX6ULL 参考手册（下载后才能查看，需要登录NXP官网）</td>    </tr></table>
              </div>
            </details>

<p>在linux中有一个调试代码的神器，就是strace命令，这一节就来看一下如何编译它的源码，将它移植到我们的开发板上来吧。</p>
<h1 id="一、strace简介"><a href="#一、strace简介" class="headerlink" title="一、strace简介"></a><font size=3>一、strace简介</font></h1><h2 id="1-简介"><a href="#1-简介" class="headerlink" title="1. 简介"></a><font size=3>1. 简介</font></h2><p>trace是一个可用于诊断、调试和教学的Linux用户空间跟踪器。我们用它来监控用户空间进程和内核的交互，比如系统调用、信号传递、进程状态变更等。可用来追踪调试程序，能够与其他命令搭配使用。</p>
<p>Linux系统管理员可以在不需要源代码的情况下即可跟踪系统的调用。strace可以显示有关进程的系统调用的信息，这可以帮助确定一个程序使用的哪个函数，当然在系统出现问题时可以使用 strace定位系统调用过程中失败的原因，这是定位系统问题的很好的方法。</p>
<h2 id="2-源码获取"><a href="#2-源码获取" class="headerlink" title="2. 源码获取"></a><font size=3>2. 源码获取</font></h2><p>源码那肯定要到官网去找啦：<a target="_blank" rel="noopener" href="https://strace.io/">strace</a></p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV07-%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%E7%A7%BB%E6%A4%8D/LV07-04-strace%E5%91%BD%E4%BB%A4-%E7%A7%BB%E6%A4%8D/img/image-20240410074846424.png" alt="image-20240410074846424" style="zoom:50%;" />

<p>我们打开对应的github仓库，找自己想要移植的版本就可以了。另外也可以来这里下载源码<a target="_blank" rel="noopener" href="https://strace.io/files/">Index of &#x2F;files&#x2F; (strace.io)</a>，这里可能会更快一些：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV07-%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%E7%A7%BB%E6%A4%8D/LV07-04-strace%E5%91%BD%E4%BB%A4-%E7%A7%BB%E6%A4%8D/img/image-20240410075030275.png" alt="image-20240410075030275" />

<p>这里我直接下了当前的最新版本，也就是6.8版本：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV07-%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%E7%A7%BB%E6%A4%8D/LV07-04-strace%E5%91%BD%E4%BB%A4-%E7%A7%BB%E6%A4%8D/img/image-20240410075131896.png" alt="image-20240410075131896" />

<p>然后就是再ubuntu下解压啦（我这里用的是ubuntu16.04）：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">xz -d strace-6.8.tar.xz</span><br><span class="line">tar -xvf strace-6.8.tar</span><br><span class="line"><span class="meta prompt_"></span></span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">其实吧，用下面这一个其实就够了</span></span><br><span class="line">tar -xvf strace-6.8.tar.xz</span><br></pre></td></tr></table></figure>

<p>解压后我们会得到以下文件：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV07-%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%E7%A7%BB%E6%A4%8D/LV07-04-strace%E5%91%BD%E4%BB%A4-%E7%A7%BB%E6%A4%8D/img/image-20240410075634200.png" alt="image-20240410075634200" style="zoom:50%;" />

<h1 id="二、移植strace"><a href="#二、移植strace" class="headerlink" title="二、移植strace"></a><font size=3>二、移植strace</font></h1><h2 id="1-编译strace源码"><a href="#1-编译strace源码" class="headerlink" title="1. 编译strace源码"></a><font size=3>1. 编译strace源码</font></h2><p>我们要移植到linux开发板上，使用的是arm架构，所以要用交叉编译工具来进行编译，我使用的交叉编译工具版本信息如下：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">hk@vm:~/5ALPHA/strace-6.8$ arm-linux-gnueabihf-gcc -v</span><br><span class="line">Using built-in specs.</span><br><span class="line">COLLECT_GCC=arm-linux-gnueabihf-gcc</span><br><span class="line">COLLECT_LTO_WRAPPER=/home/hk/2software/gcc-linaro-4.9.4/bin/../libexec/gcc/arm-linux-gnueabihf/4.9.4/lto-wrapper</span><br><span class="line">Target: arm-linux-gnueabihf</span><br><span class="line">Configured with: /home/tcwg-buildslave/workspace/tcwg-make-release/label/docker-trusty-amd64-tcwg-build/target/arm-linux-gnueabihf/snapshots/gcc-linaro-4.9-2017.01/configure SHELL=/bin/bash --with-mpc=/home/tcwg-buildslave/workspace/tcwg-make-release/label/docker-trusty-amd64-tcwg-build/target/arm-linux-gnueabihf/_build/builds/destdir/x86_64-unknown-linux-gnu --with-mpfr=/home/tcwg-buildslave/workspace/tcwg-make-release/label/docker-trusty-amd64-tcwg-build/target/arm-linux-gnueabihf/_build/builds/destdir/x86_64-unknown-linux-gnu --with-gmp=/home/tcwg-buildslave/workspace/tcwg-make-release/label/docker-trusty-amd64-tcwg-build/target/arm-linux-gnueabihf/_build/builds/destdir/x86_64-unknown-linux-gnu --with-gnu-as --with-gnu-ld --disable-libmudflap --enable-lto --enable-objc-gc --enable-shared --without-included-gettext --enable-nls --disable-sjlj-exceptions --enable-gnu-unique-object --enable-linker-build-id --disable-libstdcxx-pch --enable-c99 --enable-clocale=gnu --enable-libstdcxx-debug --enable-long-long --with-cloog=no --with-ppl=no --with-isl=no --disable-multilib --with-float=hard --with-mode=thumb --with-tune=cortex-a9 --with-arch=armv7-a --with-fpu=vfpv3-d16 --enable-threads=posix --enable-multiarch --enable-libstdcxx-time=yes --with-build-sysroot=/home/tcwg-buildslave/workspace/tcwg-make-release/label/docker-trusty-amd64-tcwg-build/target/arm-linux-gnueabihf/_build/sysroots/arm-linux-gnueabihf --with-sysroot=/home/tcwg-buildslave/workspace/tcwg-make-release/label/docker-trusty-amd64-tcwg-build/target/arm-linux-gnueabihf/_build/builds/destdir/x86_64-unknown-linux-gnu/arm-linux-gnueabihf/libc --enable-checking=release --disable-bootstrap --enable-languages=c,c++,fortran,lto --build=x86_64-unknown-linux-gnu --host=x86_64-unknown-linux-gnu --target=arm-linux-gnueabihf --prefix=/home/tcwg-buildslave/workspace/tcwg-make-release/label/docker-trusty-amd64-tcwg-build/target/arm-linux-gnueabihf/_build/builds/destdir/x86_64-unknown-linux-gnu</span><br><span class="line">Thread model: posix</span><br><span class="line">gcc version 4.9.4 (Linaro GCC 4.9-2017.01) </span><br></pre></td></tr></table></figure>

<p>编译源码的命令如下：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">cd ~/5ALPHA/strace-6.8</span><br><span class="line">mkdir output</span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">  --host:主机使用的交叉前缀名</span></span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">--prefix:编译输出目录，绝对路径，这个不指定的话，好像有问题，它不在自己源码目录下，而是直接输出到ubuntu的根目录中了</span></span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">      CC:GCC交叉编译器</span></span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">      LD:GCC交叉链接工具</span> </span><br><span class="line">./configure --host=arm-linux-gnueabihf \</span><br><span class="line">				CC=arm-linux-gnueabihf-gcc \</span><br><span class="line">				LD=arm-linux-gnueabihf-ld \</span><br><span class="line">				--prefix=/home/hk/5ALPHA/strace-6.8/output #/usr/strace_arm</span><br><span class="line">	</span><br><span class="line">make</span><br><span class="line">make install</span><br></pre></td></tr></table></figure>

<p>上面没啥意外的话应该是没啥意外的，就是没明白哪个<code>--prefix</code>参数，不指定吧，没有root权限又会报错，指定吧，又没有输出在那个目录，难道是做中间缓存目录用的？最后生成的可执行文件在starce源码目录下的bin目录中：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV07-%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%E7%A7%BB%E6%A4%8D/LV07-04-strace%E5%91%BD%E4%BB%A4-%E7%A7%BB%E6%A4%8D/img/image-20240424073454263.png" alt="image-20240424073454263" style="zoom:50%;" />

<p>我们可以使用file命令来看一下它是不是我们要的格式：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV07-%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%E7%A7%BB%E6%A4%8D/LV07-04-strace%E5%91%BD%E4%BB%A4-%E7%A7%BB%E6%A4%8D/img/image-20240424073540065.png" alt="image-20240424073540065" style="zoom:50%;" />

<h2 id="2-怎么放到开发板中去？"><a href="#2-怎么放到开发板中去？" class="headerlink" title="2. 怎么放到开发板中去？"></a><font size=3>2. 怎么放到开发板中去？</font></h2><p>啊，这里有点头大，我之前自己学习的时候是从nfs加载根文件系统，所以直接在ubuntu中拷贝到对应的目录中去就可以了，做这个命令移植学习的时候环境没得了，就只能全部烧录一遍啦，我们首先把这个编译出来的strace命令放到根文件系统中去。我这里直接先使用正点原子官方出厂的固件来搞，防止出现缺失库的情况，毕竟现在重点是学习命令的使用，后面出现了什么问题再在笔记中补充。</p>
<h3 id="2-1-重新压缩根文件系统"><a href="#2-1-重新压缩根文件系统" class="headerlink" title="2.1 重新压缩根文件系统"></a><font size=3>2.1 重新压缩根文件系统</font></h3><p>在烧写工具的固件中有根文件系统，在这里：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV07-%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%E7%A7%BB%E6%A4%8D/LV07-04-strace%E5%91%BD%E4%BB%A4-%E7%A7%BB%E6%A4%8D/img/image-20240424074331649.png" alt="image-20240424074331649" style="zoom:50%;" />

<p>这个压缩包是<code>.tar.bz2</code>格式，我不知道为什么解压缩会有问题，可能是使用的是winrar的原因？我后来索性就把file目录全部拷贝到ubuntu中，使用tar命令来重新搞啦。解压命令如下：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">tar -xvf rootfs.tar.bz2</span><br></pre></td></tr></table></figure>

<p>解压完后，把strace命令放在根文件系统的bin目录下：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV07-%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%E7%A7%BB%E6%A4%8D/LV07-04-strace%E5%91%BD%E4%BB%A4-%E7%A7%BB%E6%A4%8D/img/image-20240424074806204.png" alt="image-20240424074806204" style="zoom:50%;" />

<p>放好后，我们重新压缩：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">cd .. #回到上一级再压缩</span><br><span class="line">sudo tar -cjf rootfs.tar.bz2 filesystem/* # 不加sudo的话，可能有些步骤要报错</span><br></pre></td></tr></table></figure>

<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV07-%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%E7%A7%BB%E6%A4%8D/LV07-04-strace%E5%91%BD%E4%BB%A4-%E7%A7%BB%E6%A4%8D/img/image-20240424075503496.png" alt="image-20240424075503496" style="zoom:50%;" />

<p>加上sudo之后就正常了。但是这里可能会有问题，就是这样压缩出来，解压后，我们会得到一个filesystem目录，目录里面才是根文件系统，这对于我们后面烧写的时候是一个很大的bug，可能会出现找不到根文件系统相关目录的bug，我后面通过ubuntu使用脚本烧写系统到SD卡的时候就是这样的：</p>
<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV07-%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%E7%A7%BB%E6%A4%8D/LV07-04-strace%E5%91%BD%E4%BB%A4-%E7%A7%BB%E6%A4%8D/img/image-20240424230416176.png" alt="image-20240424230416176" style="zoom:50%;" />

<p>应该直接在filesystem目录下进行压缩：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">sudo tar -cjf rootfs.tar.bz2 ./*</span><br></pre></td></tr></table></figure>



<h3 id="2-2-烧写到SD卡？"><a href="#2-2-烧写到SD卡？" class="headerlink" title="2.2 烧写到SD卡？"></a><font size=3>2.2 烧写到SD卡？</font></h3><p>这一步我么就可以直接在ubuntu中进行了，可以参考《LV01-02-IMX6ULL-ALPHA开发板体验-03-开发板系统烧写》笔记中的《2. 烧写系统到TF卡》一小节，这里就不赘述了。这个过程会非常慢，耐心等一下吧。</p>
<h3 id="2-3-启动开发板测试"><a href="#2-3-启动开发板测试" class="headerlink" title="2.3 启动开发板测试"></a><font size=3>2.3 启动开发板测试</font></h3><p>我们按照对应章节的笔记烧写完毕后，从sd卡启动系统，然后我们看一下根文件系统中的文件：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">ls /bin/str*</span><br></pre></td></tr></table></figure>

<img data-src="https://fanhua-picture.oss-cn-hangzhou.aliyuncs.com/01%E5%B5%8C%E5%85%A5%E5%BC%8F%E5%BC%80%E5%8F%91/02IMX6ULL%E5%B9%B3%E5%8F%B0/LV07-%E7%AC%AC%E4%B8%89%E6%96%B9%E5%BA%93%E7%A7%BB%E6%A4%8D/LV07-04-strace%E5%91%BD%E4%BB%A4-%E7%A7%BB%E6%A4%8D/img/image-20240424231950807.png" alt="image-20240424231950807" style="zoom:50%;" />

<h2 id="3-基本测试"><a href="#3-基本测试" class="headerlink" title="3. 基本测试"></a><font size=3>3. 基本测试</font></h2><p>我们使用以下命令来查看strace的帮助说明：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">strace -v</span><br></pre></td></tr></table></figure>

<p>然后就会看到如下打印信息：</p>
<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br></pre></td><td class="code"><pre><span class="line">root@ATK-IMX6U:~# strace -v</span><br><span class="line">strace: must have PROG [ARGS] or -p PID</span><br><span class="line">Try &#x27;strace -h&#x27; for more information.</span><br><span class="line">root@ATK-IMX6U:~# strace -h</span><br><span class="line">usage: strace [-CdffhiqrtttTvVwxxy] [-I n] [-e expr]...</span><br><span class="line">              [-a column] [-o file] [-s strsize] [-P path]...</span><br><span class="line">              -p pid... / [-D] [-E var=val]... [-u username] PROG [ARGS]</span><br><span class="line">   or: strace -c[dfw] [-I n] [-e expr]... [-O overhead] [-S sortby]</span><br><span class="line">              -p pid... / [-D] [-E var=val]... [-u username] PROG [ARGS]</span><br><span class="line"></span><br><span class="line">Output format:</span><br><span class="line">  -a column      alignment COLUMN for printing syscall results (default 40)</span><br><span class="line">  -i             print instruction pointer at time of syscall</span><br><span class="line">  -o file        send trace output to FILE instead of stderr</span><br><span class="line">  -q             suppress messages about attaching, detaching, etc.</span><br><span class="line">  -r             print relative timestamp</span><br><span class="line">  -s strsize     limit length of print strings to STRSIZE chars (default 32)</span><br><span class="line">  -t             print absolute timestamp</span><br><span class="line">  -tt            print absolute timestamp with usecs</span><br><span class="line">  -T             print time spent in each syscall</span><br><span class="line">  -x             print non-ascii strings in hex</span><br><span class="line">  -xx            print all strings in hex</span><br><span class="line">  -y             print paths associated with file descriptor arguments</span><br><span class="line">  -yy            print ip:port pairs associated with socket file descriptors</span><br><span class="line"></span><br><span class="line">Statistics:</span><br><span class="line">  -c             count time, calls, and errors for each syscall and report summary</span><br><span class="line">  -C             like -c but also print regular output</span><br><span class="line">  -O overhead    set overhead for tracing syscalls to OVERHEAD usecs</span><br><span class="line">  -S sortby      sort syscall counts by: time, calls, name, nothing (default time)</span><br><span class="line">  -w             summarise syscall latency (default is system time)</span><br><span class="line"></span><br><span class="line">Filtering:</span><br><span class="line">  -e expr        a qualifying expression: option=[!]all or option=[!]val1[,val2]...</span><br><span class="line">     options:    trace, abbrev, verbose, raw, signal, read, write</span><br><span class="line">  -P path        trace accesses to path</span><br><span class="line"></span><br><span class="line">Tracing:</span><br><span class="line">  -b execve      detach on execve syscall</span><br><span class="line">  -D             run tracer process as a detached grandchild, not as parent</span><br><span class="line">  -f             follow forks</span><br><span class="line">  -ff            follow forks with output into separate files</span><br><span class="line">  -I interruptible</span><br><span class="line">     1:          no signals are blocked</span><br><span class="line">     2:          fatal signals are blocked while decoding syscall (default)</span><br><span class="line">     3:          fatal signals are always blocked (default if &#x27;-o FILE PROG&#x27;)</span><br><span class="line">     4:          fatal signals and SIGTSTP (^Z) are always blocked</span><br><span class="line">                 (useful to make &#x27;strace -o FILE PROG&#x27; not stop on ^Z)</span><br><span class="line"></span><br><span class="line">Startup:</span><br><span class="line">  -E var         remove var from the environment for command</span><br><span class="line">  -E var=val     put var=val in the environment for command</span><br><span class="line">  -p pid         trace process with process id PID, may be repeated</span><br><span class="line">  -u username    run command as username handling setuid and/or setgid</span><br><span class="line"></span><br><span class="line">Miscellaneous:</span><br><span class="line">  -d             enable debug output to stderr</span><br><span class="line">  -v             verbose mode: print unabbreviated argv, stat, termios, etc. args</span><br><span class="line">  -h             print help message</span><br><span class="line">  -V             print version</span><br><span class="line"></span><br></pre></td></tr></table></figure>

<p>这其实也是说明了我们移植的strace命令是可以正常使用的。</p>

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    <p><span>文章标题:</span><a href="/post/fec95377.html">LV07-04-strace命令-移植</a></p>
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